content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2012, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
   * Other names may be trademarks of their respective owners.]
   *
   * ---------------
   * LineBorder.java
   * ---------------
   * (C) Copyright 2007-2012, by Christo Zietsman and Contributors.
   *
   * Original Author:  Christo Zietsman;
   * Contributor(s):   David Gilbert (for Object Refinery Limited);
   *
   * Changes:
   * --------
   * 16-Mar-2007 : Version 1, contributed by Christo Zietsman with
   *               modifications by DG (DG);
   * 13-Jun-2007 : Don't draw if area doesn't have positive dimensions (DG);
   * 17-Jun-2012 : Removed JCommon dependencies (DG);
   *
   */
  
  package org.jfree.chart.block;
  
  import java.awt.BasicStroke;
  import java.awt.Color;
  import java.awt.Graphics2D;
  import java.awt.Paint;
  import java.awt.Stroke;
  import java.awt.geom.Line2D;
  import java.awt.geom.Rectangle2D;
  import java.io.IOException;
  import java.io.ObjectInputStream;
  import java.io.ObjectOutputStream;
  import java.io.Serializable;
  
  import org.jfree.chart.ui.RectangleInsets;
  import org.jfree.chart.util.ObjectUtilities;
  import org.jfree.chart.util.PaintUtilities;
  import org.jfree.chart.util.SerialUtilities;
  
  /**
   * A line border for any {@link AbstractBlock}.
   *
   * @since 1.0.5
   */
  public class LineBorder implements BlockFrame, Serializable {
  
      /** For serialization. */
      static final long serialVersionUID = 4630356736707233924L;
  
      /** The line color. */
      private transient Paint paint;
  
      /** The line stroke. */
      private transient Stroke stroke;
  
      /** The insets. */
      private RectangleInsets insets;
  
      /**
       * Creates a default border.
       */
      public LineBorder() {
          this(Color.BLACK, new BasicStroke(1.0f), new RectangleInsets(1.0, 1.0,
                  1.0, 1.0));
      }
  
      /**
       * Creates a new border with the specified color.
       *
       * @param paint  the color (<code>null</code> not permitted).
       * @param stroke  the border stroke (<code>null</code> not permitted).
       * @param insets  the insets (<code>null</code> not permitted).
       */
      public LineBorder(Paint paint, Stroke stroke, RectangleInsets insets) {
          if (paint == null) {
              throw new IllegalArgumentException("Null 'paint' argument.");
          }
          if (stroke == null) {
              throw new IllegalArgumentException("Null 'stroke' argument.");
          }
          if (insets == null) {
              throw new IllegalArgumentException("Null 'insets' argument.");
          }
          this.paint = paint;
          this.stroke = stroke;
          this.insets = insets;
      }
  
      /**
       * Returns the paint.
       *
       * @return The paint (never <code>null</code>).
       */
      public Paint getPaint() {
          return this.paint;
      }
  
      /**
       * Returns the insets.
       *
       * @return The insets (never <code>null</code>).
       */
      @Override
      public RectangleInsets getInsets() {
          return this.insets;
      }
  
      /**
       * Returns the stroke.
       *
       * @return The stroke (never <code>null</code>).
       */
      public Stroke getStroke() {
          return this.stroke;
      }
  
      /**
       * Draws the border by filling in the reserved space (in black).
       *
       * @param g2  the graphics device.
       * @param area  the area.
       */
      @Override
      public void draw(Graphics2D g2, Rectangle2D area) {
          double w = area.getWidth();
          double h = area.getHeight();
          // if the area has zero height or width, we shouldn't draw anything
          if (w <= 0.0 || h <= 0.0) {
              return;
          }
          double t = this.insets.calculateTopInset(h);
          double b = this.insets.calculateBottomInset(h);
          double l = this.insets.calculateLeftInset(w);
          double r = this.insets.calculateRightInset(w);
          double x = area.getX();
          double y = area.getY();
          double x0 = x + l / 2.0;
          double x1 = x + w - r / 2.0;
          double y0 = y + h - b / 2.0;
          double y1 = y + t / 2.0;
          g2.setPaint(getPaint());
          g2.setStroke(getStroke());
          Line2D line = new Line2D.Double();
          if (t > 0.0) {
              line.setLine(x0, y1, x1, y1);
              g2.draw(line);
          }
          if (b > 0.0) {
              line.setLine(x0, y0, x1, y0);
              g2.draw(line);
          }
          if (l > 0.0) {
              line.setLine(x0, y0, x0, y1);
              g2.draw(line);
          }
          if (r > 0.0) {
              line.setLine(x1, y0, x1, y1);
              g2.draw(line);
          }
      }
  
      /**
       * Tests this border for equality with an arbitrary instance.
       *
       * @param obj  the object (<code>null</code> permitted).
       *
       * @return A boolean.
       */
      @Override
      public boolean equals(Object obj) {
          if (obj == this) {
              return true;
          }
          if (!(obj instanceof LineBorder)) {
              return false;
          }
          LineBorder that = (LineBorder) obj;
          if (!PaintUtilities.equal(this.paint, that.paint)) {
              return false;
          }
          if (!ObjectUtilities.equal(this.stroke, that.stroke)) {
              return false;
          }
          if (!this.insets.equals(that.insets)) {
              return false;
          }
          return true;
      }
  
      /**
       * Provides serialization support.
       *
       * @param stream  the output stream.
       *
       * @throws IOException  if there is an I/O error.
       */
      private void writeObject(ObjectOutputStream stream) throws IOException {
          stream.defaultWriteObject();
          SerialUtilities.writePaint(this.paint, stream);
          SerialUtilities.writeStroke(this.stroke, stream);
      }
  
      /**
       * Provides serialization support.
       *
       * @param stream  the input stream.
       *
       * @throws IOException  if there is an I/O error.
       * @throws ClassNotFoundException  if there is a classpath problem.
       */
      private void readObject(ObjectInputStream stream)
          throws IOException, ClassNotFoundException {
          stream.defaultReadObject();
          this.paint = SerialUtilities.readPaint(stream);
          this.stroke = SerialUtilities.readStroke(stream);
      }
  }
  
  
  